Assig-nob



Sept. 10, 1929. KRUSE 1,727,548

VALVE Filed May 12, 1926 anomto'c 0310 I TIfizwe :4

Patented Sept. 10, 1929. l

tlhll'liltl) STATES P'l'EN'l FHCEE.

OTTO V. KRUSE, OF ST. DAVIDS, PENNSYLVANIA, ASSXG-IE'OB, BY MESNE ASSIGN- IVIEN'LES, 1'0 1. P. MORRIS COBPGELKTIGN, A GGRPGBATIUN OF DELAWARE.

VALVE.

Application filed May 12, 1926'. Serial No. loll/69.

This invention relates to valve mechanisms preferably annular, while the outer end of and more particularly to the type having a the cylinder is closed by an upstream casing fluid controlled plunger. member A. The flange 13 and member 14 it is an object of my invention to provide may be secured to the casing 4 in any well- 5 an.improvedarrangemcntot fluid controlling known manner, such as cap screws or the elements, which arrangement is particularly like. This construction permits, in addition adapted to be effective during the final closto other features. the ready inspection of :ing stroke of the plunger. A further object the piston and cylinder or the removal there- .is to provide an improved arrangement of of without in any way dismantling the 10 elements whereby the plunger may move at plunger 5. a relatively fast rate during initial closing A control pipe 17 allows communication moven'ient, and will then be automatically between the downstream pipe 2 and the chamretarded during the final movement. Anher A formed by the plunger and easing 4., other object is to provide a valve which will while an auxiliary supply pipe 18 which has 15 close at a substantially uniform rate irrea throttle valve 19 disposed therein allows spective of pressure conditions in the pipe communication between the upstream pipe beyond the valve. In this respect the plung- 1 and chamber A. A check valve 19 preer, while hydraulically operated, is not pervents fluid flow from the chamber A, while mitted to change appreciably its rate Of a hand valve 20 may be used to close off or 20 stroke, even though a complete loss of presotherwise adjust fluid fiow relative to sure in the pipe beyond the valve at some pipe 17.

point in the stroke would tend to cause such To control fluid flow relative to the cylinan acceleration. A still further object is to der 8 there is provided a supply pipe 21 provide such an arrangement that even having communication with opposite ends of 25 though the plunger is retarded during the a chamber, within which a balanced cylinfinal closing movement yet there will be sufdrical control valve 22' is disposed. Pipes .licieut fluid pressure for closing the plunger. 24 and 25 lead respectively from the valve The foregoing and other objects 01": my inchamber to the up and down stream sides of vcution will be apparent from the following the cylinder 8. A suitable exhaust port 21 description or" the accompanying drawing, leading downward is provided in the valve which is a sectional view of the valve mcchachamber to allow exhaust of? pressure from niszn with certain auxiliary elements shown either end of the cylinder 8 through pipes 2% in elevation. and Cylinder 8 is provided with an on- In the illustrative embodiment of my inlarged port 26 and a restricted port 27, both 35 vcntion I hav shown interposed between up communicating with a common passage 28, and downstream pipes 1 and 2 a valve mechawithin which the pipe 25 terminates. The nism having an outer casing 3 and an inner port 26 allows relatively free movement of easing l spaced therefrom by suitable ribs the fluid, while the port 27 will. in addition to so as to provide a smooth, substantially anthe piping system first described, retard final 40 nular shaped fluid passage. The casing 4 closing movement of the plunger. slidably carries a plunger 5 having a passage To eiiect closing, opening or diii'erent 6 in the nose thereof, and an annular guidthrottling positions of the plunger here is ing portion 7. To control the plunger and provided a rod 80 positively connected to i'novc the same relative to the valve seat 8 the plunger 5 and extending through a suit- 45 there is provided, separate from the plunger aole packing in the casing This rod car- 5. a cylinder 8 having a piston 9 disposed ries an arm having a nut 31 connected to a therein. A piston rod 10 carries a valve 11, screw 32 by usual. screw threads. The screw which is adapted to control the passage 6 or 32 is connected to the valve 22 for longito abut a collar 12 fixed to the plunger 5. tudinal movement in opposite directions,

50 The c *linder 8 su) Jorted asb a fian e 13 while the screw is rotated b a hand wheel 300 d l a: a

33 and bevel gears 34, one of which is splined to the screw 32.

In the operation to close the valve the operator will rotate the screw 32, which due to its cooperation with the nut 31 will cause movement of valve 22 in a left hand direction to permit supply of fluid from pipe 21 to the pipe 24 and to connect the pipe 25 with the exhaust port. This valve mecha nism is well-known. Also the supply fluid may come from either the pipe line or from a suitable exterior source. This pressure would cause movement of piston 9, and accordingly close the passage 6. Pressure acting on the piston 9 and the pressure within the chamber A, which flows through pipes 17 and 18 will cause closing movement of the plunger. As the plunger moves the screw 32 is moved in a right hand direction also, thereby causing the screw to slide through the bevel gear and restore the valve 22 to its neutral position, thereby holding the piston 9 stationary. This would effect a given throttle position of the plunger, but should it be desired to close the plunger entirely the operator continuously rotates the hand wheel 33 to maintain valve 22 in a lei t hand open position. Fluid flow in the pipes 24 and 25 could, of course, be controlled by any suitable valve mechanism, but in any case when the plunger approaches its seat pressure in the downstream pipe 2 will drop ma terially while pressure in the upstream pipe 1 will remain substantially normal. The result is that when the plunger 5 reaches this closing point in its stroke there is a tendency for the plunger to move away from the pilot valve 11,,thus openingup the orifice in the nose of the plunger and relieving pressure in the chamber A to correspond with the low pressure created beyond the plunger by the plunger approaching its closed position. The same drop in pressure renders pipe 17, due to check valve 19, ineilective for relieving pressure in chamber A thereby holding sufficient pressure in chamber A to complete the closing stroke. During this latter part of the closing stroke the plunger is like a free discharge valve in that the pressure from the chamber A is exhausted through the orifice 6, and pressure is also admitted to the chamber A through the fit around the plunger and the pipe 18. During the initial closing movement of plunger 5 fluid can flow from the down stream pipe 2 through pipe 17 to chamber A thereby to keep the pressure in chamber A substanially the same in the down stream pipe.

The restoring mechanism has the advantage of assisting and controlling the plunger during its transition from operation in dead water to operation under free discharge conditions. The tendency of the plunger during final closing is to move away from the pilot valve, open up the orifice 6 and tend to reverse the setting of the control valve 22 with the effect that a reverse action of the piston 9 will further open the plunger orifice. Hence'a very rapid and eilective opening of the orifice 6 is accomplished. The opening of the orifice need be very little as it only has to take care of the water or fluid coming through the leakage space, together with what small amount might be ad mitted through the pipe 18. At the end of the closing stroke a dash-pot action will be had due to the covering of port 2-6. in addition to this dash-pot action the plunger enters an annular machined surface adjacent the seat so that practically all of the water passage is cut oil while the plunger is still. some little distance from its seat. To hold the plunger shut the valve 11 will be moved forwardly to close the orifice 6.

To open the plunger, proper reverse manipulation of handwheel would cause the orifice 6 to be opened to discharge pressure from the chamber A, which with the aid of pressure in the downstream side of cylinder 8 would permit opening movement of the plunger.

The closing of the valve can be accomplished with pipe 1? closed off entirely and supplying pressure only through pipe 18 and through the leakage space; or with pipe 18 closed off entirely and supplying pressure through pipe 17 for the initial closure and through the leakage space only for the final closure; or with the combination oi the three sources out pressure supply.

I claim:

1. The combination with a valve mechanism having an outer casing and an inner casing within which a plunger is telescopically arranged to provide a fluid chamber, a plunger seat, a valve controlled port in said plunger, and piston and cylinder elements for controlling said port valve mechanism, of a pipe allowing communication between said chamber and the downstream side oi the valve adjacent the valve seat, means for controlling fiuid pressure in said cylinder element, and means adapted automatically to prevent fluid fiow through said pipe when said plunger is in final closing movement.

2. The combination with a valve mechanism having. a plunger, means forming therewith a fluid operating chamber, and a valve seat, of means permitting connnunication between said chamber and the downstream side of the valve mechanism adjacent the valve seat, and means adapted automatically to prevent said communication when said plunger is in its final closing movement.

The combination with a valve mechanism having a casing, a plunger cooperating therewith to form a fluid chamber, a valve controlled port in said plunger, and means for controlling said port valve, of means for allowing communication between said chamher and a part of the pipe line in which the valve mechanism is disposable, and means adapted auton'iatically to prevent said communication when said plunger is in its final cl sing movement.

4i. The combination with a valve mechanism having a casing and a plunger cooper ating therewith to form a fluid chamber, a valve controlled port in said plunger, and means forming a seat for the plunger, of means for allowing communication between the chamber and the pipe line beyond said seat but adjacent thereto, means for closing said port to effect initial closing movement oi the plunger, means for controlling said port whereby the same is adapted to open automatically when the plunger is in its final closing movement, and means for automatically preventing tluid flow from said chamher when said port is so opened to said downstream pipe.

5. The combination with a valve mechanism having a casing and a plunger cooperating therewith to form a fluid chamber, a valve controlled port in said plunger, means forming a seat for the plunger, oi? means for allowing communication between the chamher and the pipe line beyond said seat but adjacent thereto, means for closing said port to effect initial closing movement of the plunger, means for controlling said port whereby the same is adapted to open automatically when the plunger is in its final closing movement, means for automatically preventing fluid flow from said chamber to said downstream pipe when said port is so opened, and means for permitting supply of fluid to said chamber during said final closing plunger movement.

6. The combination with a valve mechanism comprising inner and outer casings, a plunger having telescopic relation with the i nner casing to form a fluid chamber, and a seat for the plunger formed on the outer casing, of a pipe extending to the exterior of said casings and adapted to allow communication between the downstream side of the valve mechanism adjacent the valve seat and iid chamber, and means for preventing fluid flow from the chamber through said exterior pipe to the downstream pipe.

The combination with a valve mechanism havinginner and outer casings concentrically spaced to form a smooth iiuid passage'way, a plunger having telescopic relation with said inner casing to form a fluid chamber, a seat for said plijingcr 't'i'irmed on said outer casing, said plunger having a port in the nose thereof, a valve for contmiling said port, piston and cylinder elements 0' posed in said chamber but separate from said plunger, one oi? said elements being movable, means for connecting said movable (element to said valve, and i'neans for eontrollin ll flow to said cylinder element, oi a pipe cylinder elements within the outer limiis controlling said valve, nisin associated with E-lltli. p on and cylinder eieme as whereby v: said plunger .ds to more so as to ope plimger valve meclu nu. h sm will be ac said p movement of said plunger valve 9. The combinati n with a v ni-sm having plun means tornii with a fluid opera cl amber, a. seat, of means permit commun tween said chambc and the downs of the valve inec anisni adji i seat including a passage, and means maticallv preventing coumnznicatim'i said passage in response to a d rep in p below normal at the downstream side o; valve.

10. The combinatioi'i with a valve n nism. lug, a plunger, means forming therewith a iiuid operl cha her, at l a va ve seat, of means c2 ailing the enter], of said mechanism for permitting coiuuuniiciu tion between said chamber and the downstream side of the valve mechanism adjacent the valve seat, and means for automatic: preventing communication through said e terior means in response to a drop in irea sure below normal at the downstream side of the valve.

11. In combination, a valve mechanism of the plunger type having a pilot valve in the plunger, a restoring mechanism associated with said plunger, and means whereby when said plunger moves in. a closing direction, said pilot valve may be opened and said restoring mechanism. actuated so as to cause the rate of opening of said pilot valve to in crease.

12. In combination, a valve mechanism of the plunger type having a passage in the nose thereof adapted to permit communication between the interior and exterior of said plunger, piston and cylinder elements disposed substantially within the outer limits of the plunger and connected thereto by a piston rod, and a restoring mechanism associated with said plunger and said piston and cylinder elements whereby when said plu' g er tends to move at a rate in excess of a pre determined value said restoring mechanism is actuated to control fluid flow to said cylinder and thereby control the rate of movement of said plunger.

13. In combination, a valve mechanism of the plunger type, piston and cylinder elements, one of which is connected to said plunger by a rod, a restoring mechanism also associated with said plunger and said piston and cylinder elements whereby when said plunger tends to move at a rate in excess of a predetermined value said restoring mechanism is actuated to control fluid flow to said cylinder and thereby control the rate of movement of said plunger, said rod connection including a lost motion connection.

14. In combination, a Valve mechanism having a plunger and means cooperating therewith to form a fluid chamber, means forming a valve seat, a pipe permitting communication between said chamber and the downstream side of the valve mechanism adjacent said seat, and a check valve in said pipe for preventing flow of fluid from said chamber when pressure in the downstream side of the plunger drops below normal.

15. In combination, a valve mechanism comprising a plunger, means cooperating therewith to form a fluid chamber, means forming a passage leading from said chamber to the upstream side of said plunger, means forming a passage leading from within said plunger to the down stream side of said plunger, and a check valve disposed in said latter passage adapted to prevent fluid flow from said chamber to said pipe.

OTTO V. KRUSE. 

